Apple just doesn’t want to support it, and for developers, they want them to buy Macs to work on and only use VMs when absolutely necessary.
Every single mid-sized IT shop in the world has an urgent and valid use-case to virtualize OSX in an efficient and portable manner. Most individual power-end-users have similar use-cases.
How many hours / dollars / gigatons-of-carbon / calories are wasted on this comically inefficient, user-hostile and gratuitously complex state of affairs ?
Many, many more that are being "saved" by them not bundling chargers in iPhone. Kind of shows you where they stand.
Follow the $$$.
Apple sells integrated hardware and software. They don’t license macOS to anyone else. Why would they start now having seen that strategy fail in their corporate history already?
Jony Ive rolling in his grave.
It would have been more likely for AWS to give specs to Apple, who could have then created a custom job for some extra monies.
In reality though, using Mac Minis is perfectly reasonable. It's likely the cheapest option for both Apple and Amazon.